Rotary compressor



p 30, 1930. A. MOESSINGER 1,776,921

' ROTARY COMPRESSOR Filed June 17, '1927 BY I G O MJM ATTD RN EYS 35'mounted on a shaft e supported in bearmamuonssmena, or 'wm'rna'rnnn,

the compressor casing and a 'member disposed within it.

Patented sep ao; 193a UNITED T T S swnzmtm," Assmnon. we "ran rm BULZER.rnnnns socnrrn .enomn, or wmrnarnunswnzmnm1 noun: conrnnsson Applicationglee June 17, 1927, Serial in. 199,444, and m sme ma 1111 ma Thisinvention relates to rotary-compressors of the kind in which thecompression, is

effected by means of the relative movement of According to the presentinvention the lateral walls of the workin space in a rotary compressorof the kind escribed are inthe form of rotating discs, thecircumferential edges of which slide in an air tight manner on the innersurface of the compressor casing. Each disc may be disposed within achamber supplied withv lubricating medium. under pressure from thedelivery'side of the comressor, and preferably one ofthese chamrs isconnected b means of channels or ducts to the slots or the reception ofthe rotor vanes so that the slots. are also supplied with lubricatingmedium under ressure.

The rotor and the discs may be ree to move axially on the shaft, so thatirrespective of any forces acting on the shaft they-can adjustthemselves automatically thereon.

The invention may be carried out in varlous ways but one constructionaccor g thereto is illustrated by way of example in I the accompanyingdrawing in which Figure 1 is a sectional elevation on the line 1-1of-Figure 2, and

Figure 2 is a cross-section on .the line IIII of Figure 1.

In the construction illustrated in the drawing the compressor comprisesa casing a hav ing within it a suction chamber 6, working space a anddelivery chamber d, and a' rotor nally by the rotor IL, externally bythecylindrical' liner Land laterallyby discs The inletports-iand outletports .7rz' are formed in the liner Z. .The casing is; hermeticallysealed atone end by the cover 0 provided with a glass inspection window'n and at the opposite endby the end cover 9 into which is The lateralwalls of the working chamber are not, as hitherto, a fixed or rigid partof displacement under a variations in the pressure the compressorhousing but comprise rotatable discs m. These are loosely keyed to therotor shaft e by means of a key or'feather r in such a manner as topermit their axial movement along'therotor' shaft andtheircircumferentialedgesare adapted to'slide in an air tight manner ontheinner surface of thecylindricallin'er." In this way the clear chambera: connected to the delivery chamber of the compressor, in whichlubricant col lects, by means of on ipe 8. Thus each disc is forcedagainst the iner Z by means of oil ressure equal to the delivery res--sure of t e compresstonso that in addition to good lubrication of theslidin surfaces of the discs, a perfect sealing is o tained.

Further the bearings f and the stuffing box p are efliciently lubricatedand the sealing of the working space from the atmosphere is alsoimproved as the gaseous medium is unable to reach an of the joints.

A portion oft e lubricant forced into the left handchamber a: flowsthrough a channel or duct tin the shaft e. and rotor h to the slotswhich contain the vanes g, which it seals and lubricates.. Further, thelubricantwhich- 4 flows over into the working space is forced.

back again into the delivery chamber (1 to-' gether with the compressedworking medium. The thrust produced by the pressure of the lubricant onthe unbalanced end face of :the shaft e is taken up or absorbed by theleft hand ball bearing 7 which is also designed as a thrust bearing..The discs) together with the rotor h are axiall movable on the shaft,so that they can ad ust themselves automatically with respect to the clindrical casing, which is sprung or hel be-- tween distance pieces u, oand w, inde end'ently of anyaxial movement of the sha due-to of thelubricating and sealing medium.

-I claim: -1. In a rotary com of a casing, a liner essor, thecombination stationary in said casing and forming a c lindrical chambertherein, a rotor mounte to rotate in said chamber, and discs positivelymounted to rotate with said rotor and sliding on the end edges of saidstationary liner said rotor and discs being free to'move axially withrespect to said liner.

2. In a rotary compressor, the combination of a casing, a liner in saidcasing forming a cylindrical chamber therein, a shaft extending throughsaid chamber, a rotor mounted on said shaft to rotate in said chamber,and discs mounted on said shaft so as to be positively rotated therebyand slidin on the end ed es of said liner, said rotor an discs beingaxially movable on said shaft, whereby they can automatically alignthemselves with respect to said liner. 7

3. In a rotary compressor, the combination of a casin a liner in saidcasing forming a cylindrica chamber therein, a rotor mounted to'rotatein said chamber, discs mounted on said shaft so as to be positivelyrotated thereby and slidin on the end edges of said liner, said rotor andiscs being free to movaaxially with respect to said liner, and meansfor supplyin lubricant under the delivery pressure of t e compressor tothe outer ace of each of said discs, whereby said discs are yieldinglypressed against the end edges of said liner by the pressure of saidlubricant.

4. In a rotary compressor, the combination of a casing, shaft bearingsin said casing, a I

cylindrical liner disposed in said casing concentric with said bearings,and forming a cylindrical chamber eccentric thereto, a shaft mounted insaid bearings, a rotor mounted on said shaft to rotate in said chamber,and discs mounted on said shaft so as to be positively rotated therebyand sliding on the end edges of said liner, said rotor and discs beingaxially movable on said shaft, whereby they can automatically alignthemselves with respect to said liner.

5. In a rotaryco'mpressor, the combination of a casing, a shaftrotatably mounted in said casing, a liner disposed in said. casing andform a cylindrical chamber therein, a rotor having a plurality of vanesmounted on said shaft to rotate in said chamber, said shaft having axialand radial passages therein adaptedto connect theinner faces of saidconcentric with said shaft and forming a cylindrical chamber eccentricthereto, a rotor ing lubricant from said reservoir to the outer face ofeach of said discs, whereby said discs are yieldingly pressed againstthe end edges of said liner by the pressure of the li -bricant.

In testimony whereof I have aifixed my signature. a

ALBERT MOE SSINGER.

rotor vanes with a supgly. of lubricating 'medium under p mounted onsaid shaft so as to be positivel rotated thereby and sliding on the endof said liner, said rotor and discs bein axially movable-on said shaft,and means or suppl cant under presureto the of said discs ingly pressedagainst the and "edges of said liner by the pressure of said lubricant.

6. In a rotary compressor, the combination of a casing, a shaftrotatably mounted insaidcasing,alinerdisposedinsaidcasing outer ace ofeach 'lubriwhereby said discs are yield-

